CN217804955U - Rear floor structure and car - Google Patents

Abstract

The utility model provides a rear floor structure and an automobile, which comprises a front middle section of a rear floor and a rear section of the rear floor; the rear floor rear section comprises a rear floor, two rear longitudinal beams, a rear cross beam and a middle cross beam; the rear-section floor is arranged right above the energy tank body along the shape; the two rear-section longitudinal beams are respectively fixedly connected to two sides of the rear floor, and the front ends of the two rear-section longitudinal beams are respectively fixedly connected with the rear ends of the longitudinal beams on two sides of the front middle section of the rear floor; the rear cross beam is fixedly connected to the rear side of the rear floor along the X direction of the vehicle body, and two ends of the rear cross beam are respectively and fixedly connected with the rear ends of the two rear section longitudinal beams; the middle cross beam is fixedly connected to the front side of the rear floor along the X direction of the vehicle body and is fixedly connected with the rear end of the front middle section of the rear floor; wherein, the rear floor, the rear longitudinal beam and the rear cross beam are all sandwich steel plates. The utility model provides a back floor structure and car, structural strength and anti bending property are high, and can compromise the lightweight and the low energy consumption designing requirement of whole car.

Description

Rear floor structure and car

Technical Field

The utility model belongs to the technical field of the car, concretely relates to back floor structure and car.

Background

The new energy automobile adopts unconventional automobile fuel as a power source or conventional automobile fuel, adopts a novel vehicle-mounted power device, integrates advanced technologies in the aspects of power control and driving of the automobile, and accordingly forms an automobile with advanced technical principle, new technology and new structure, and mainly comprises a pure electric automobile, an extended-range electric automobile, a hybrid electric automobile, a fuel cell automobile, a hydrogen engine automobile and the like.

At present, automobiles such as hydrogen fuel cells are one of the main development directions of new energy automobiles, and have high safety requirements on the installation of hydrogen tanks, the existing automobile-type hydrogen tanks are generally arranged below the rear floor of an automobile body, and common steel plates or extruded aluminum profiles are uniformly distributed on the periphery of an energy tank body to play a role in protection, but a simple metal plate or profile structure cannot meet the requirement of collision safety, and if the hydrogen tanks pass through a metal plate reinforcing structure, the weight of the whole automobile is large, and the design requirements of light weight and low energy consumption of the automobile are not facilitated.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a back floor structure and car aims at solving the problem that the energy jar body all ring edge spare of current car can't compromise high strength and lightweight requirement.

In order to achieve the above object, the utility model adopts the following technical scheme: in a first aspect, a rear floor structure is provided, comprising a rear floor front middle section located in a region below a rear row of seats and a rear floor rear section located directly above an energy tank; the rear floor rear section comprises a rear floor, two rear longitudinal beams, a rear cross beam and a middle cross beam; the rear-section floor is arranged right above the energy tank body at intervals and is arranged along the shape of the energy tank body based on the shape of the energy tank body; the two rear section longitudinal beams are respectively fixedly connected to two sides of the rear floor and extend along the X direction of the vehicle body, and the front ends of the two rear section longitudinal beams are respectively fixedly connected with the rear ends of the longitudinal beams on two sides of the front middle section of the rear floor; the rear cross beam is fixedly connected to the rear side of the rear floor along the X direction of the vehicle body, and two ends of the rear cross beam are respectively and fixedly connected with the rear ends of the two rear section longitudinal beams; the middle cross beam is fixedly connected to the front side of the rear floor along the X direction of the vehicle body and is fixedly connected with the rear end of the front middle section of the rear floor; wherein, the rear floor, the rear longitudinal beam and the rear cross beam are all sandwich steel plates.

With reference to the first aspect, in one possible implementation manner, the sandwich steel plate includes two panels and a core tube array; wherein, the two panels are arranged at intervals; the core tube array comprises a plurality of core tube units distributed between two panels in an array mode, the two ends of each core tube unit are respectively provided with a pull edge structure, and the two pull edge structures are respectively brazed with the plate surfaces of the two panels through hot air copper.

In some embodiments, each core tube unit inside the rear floor extends normal to the rear floor where it is located.

Exemplarily, the two sides of the rear floor in the X direction of the vehicle body are respectively provided with a hem structure, the two hem structures are respectively attached and fixed with the rear cross beam and the middle cross beam, and at least one row of core tube units distributed along the Y direction of the vehicle body are arranged in the hem structures.

For example, two sides of the rear floor are respectively and fixedly connected with a first blocking plate, and the first blocking plates are used for blocking a gap between the two panels and are also used for enclosing a dome cavity suitable for accommodating the upper half part of the energy tank body together with the rear floor; the outside of two first closure plates is all laminated and is fixed with the second closure plate, and two second closure plates are respectively with two back end longerons fixed connection.

In some embodiments, each core tube unit inside the rear longitudinal beam extends along the Y direction of the vehicle body, and each core tube unit inside the rear cross beam extends along the X direction of the vehicle body.

Illustratively, both ends and upper and lower both sides all are equipped with the bounding wall around the back end longeron, and each bounding wall encloses the cavity that holds the core tube array with two panels jointly.

For example, two ends of the rear cross beam are respectively abutted and fixed with the rear end side walls of the two rear longitudinal beams, and the upper side and the lower side of the rear cross beam are fixedly connected with sealing plates.

With reference to the first aspect, in one possible implementation manner, the sound-insulating and flame-retardant layer is filled inside the sandwich steel plate.

The utility model provides a back floor structure's beneficial effect lies in: compared with the prior art, the utility model discloses back floor structure, the sandwich steel sheet is all adopted to each part of back floor back end, can utilize the higher structural strength of sandwich steel sheet self and anti bending property, promote the whole car mode in floor, utilize the good energy-absorbing effect of the inside sandwich layer of sandwich steel sheet simultaneously, can pass through back end floor, two back end longerons and back beam carry out the omnidirectional collision protection to the energy jar body, compared in conventional steel sheet metal structure or extrusion aluminium alloy structure have higher intensity, and owing to be sandwich structure, therefore self light in weight is little, use the material cost low, can compromise the lightweight and the low energy consumption designing requirement of whole car.

The second aspect, the embodiment of the utility model provides a still provides a car, including above-mentioned back floor structure, have the same beneficial effect with above-mentioned back floor structure, no longer describe here.

Drawings

Fig. 1 is a schematic perspective view of a rear floor structure according to an embodiment of the present invention;

fig. 2 is a schematic top view of a rear floor rear section in the rear floor structure according to the embodiment of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a schematic sectional view of a sandwich steel plate according to an embodiment of the present invention.

In the figure: 10. the front middle section of the rear floor; 11. a stringer; 12. a front middle floor; 20. a rear floor rear section; 200. a sandwich steel plate; 201. a panel; 202. a core tube unit; 2020. a wrenching structure; 203. a sound-insulating flame-retardant layer; 21. a rear floor; 211. a flanging structure; 212. a first closure plate; 213. a second closure plate; 22. a rear section stringer; 221. enclosing plates; 23. a rear cross member; 231. closing the plate; 24. and a middle cross beam.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and are therefore not to be considered limiting. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or several of that feature. In the description of the present invention, "plurality" or "a plurality" means two or more unless specifically defined otherwise.

It should be explained that the vehicle body X direction refers to the front-rear length direction of the vehicle, the vehicle body Y direction refers to the left-right width direction of the vehicle, the front end of the element refers to one end toward the front of the vehicle, the rear end of the element refers to one end toward the rear of the vehicle, the left side of the element refers to the left-hand side when facing the front of the vehicle, and the right side of the element refers to the right-hand side when facing the front of the vehicle.

Referring to fig. 1 to 5, a rear floor structure according to the present invention will now be described. The rear floor structure comprises a front middle section 10 of the rear floor positioned in the area below the rear row of seats and a rear section 20 of the rear floor positioned right above the energy tank body; the rear floor rear section 20 comprises a rear floor 21, two rear longitudinal beams 22, a rear cross beam 23 and a middle cross beam 24; the rear-section floor 21 is arranged right above the energy tank body at intervals and is arranged along the shape of the energy tank body based on the shape of the energy tank body; the two rear section longitudinal beams 22 are respectively fixedly connected to two sides of the rear floor and extend along the X direction of the vehicle body, and the front ends of the two rear section longitudinal beams 22 are respectively fixedly connected with the rear ends of the longitudinal beams 11 on two sides of the front middle section 10 of the rear floor; the rear cross beam 23 is fixedly connected to the rear side of the rear floor along the X direction of the vehicle body, and two ends of the rear cross beam are respectively and fixedly connected with the rear ends of the two rear section longitudinal beams 22; the middle cross beam 24 is fixedly connected to the front side of the rear floor along the X direction of the vehicle body and is fixedly connected with the rear end of the front middle section 10 of the rear floor; wherein, the rear floor 21, the rear longitudinal beam 22 and the rear cross beam 23 are all sandwich steel plates 200.

It should be noted that, in this embodiment, the energy tank specifically refers to a fuel tank, a hydrogen tank, or another tank for containing new energy fuel, and is generally cylindrical, and may also be of a flat circular or rectangular structure, and the rear floor 21 is configured according to the shape of the energy tank, so as to ensure that a safety distance of more than ten millimeters is formed between the energy tank and the rear floor 21; the front middle section 10 of the rear floor can be a front middle section floor 12 which has the same structure as the front middle section 10 of the rear floor and is of a sheet metal structure or an extruded aluminum profile structure, and the two sides of the front middle section floor are connected with a left longitudinal beam 11 and a right longitudinal beam 11 which are also of sheet metal structures; as for the rear floor rear section 20, on one hand, it is used as a floor structure, on the other hand, it is used as a protection structure of the energy tank body, each part of it includes a rear floor 21, a left and right rear longitudinal beams 22 and a rear cross beam 23, which respectively provide positive pressure, side collision and rear collision protection for the energy tank body, and because the energy tank body is located at the rear part of the whole vehicle body, and is not a direct force-bearing part in direct collision, the middle cross beam 24 located in front of the energy tank body is mainly used as a connection structure with the front middle section 10 of the rear floor, and only the conventional metal plate or aluminum profile structure is used.

It should be understood that the sandwich steel plate 200 in this embodiment may be formed by arranging a honeycomb sandwich layer between two thin steel plates, or by arranging support units in an array between two thin steel plates, of course, for the rear floor 21 of the positive pressure protection, the support units should be considered to be arranged vertically or based on the normal direction of the rear floor 21, for the two rear longitudinal beams 22 of the side impact protection, the support units should be considered to be arranged along the Y direction of the vehicle body, and for the rear cross beam 23 of the rear impact protection, the support units should be considered to be arranged along the X direction of the vehicle body.

For the connection mode between the components in this embodiment, one or more combinations of two-protection welding, laser welding, riveting or screwing can be considered, wherein, the two rear-section longitudinal beams 22 and the two longitudinal beams 11 at the left and right sides of the front middle section 10 of the rear floor are preferably connected by bolts so as to facilitate the disassembly and assembly.

Compared with the prior art, each part of the rear floor rear section 20 adopts the sandwich steel plate 200, the higher structural strength and bending resistance of the sandwich steel plate 200 can be utilized, the whole floor mode is improved, meanwhile, the good energy absorption effect of the inner sandwich layer of the sandwich steel plate 200 is utilized, the energy tank body can be subjected to omnibearing collision protection through the rear section floor 21, the two rear section longitudinal beams 22 and the rear cross beam 23, the rear floor structure has higher strength compared with a conventional steel plate metal plate structure or an extruded aluminum profile structure, and the sandwich structure is adopted, so the rear floor structure has the advantages of small self weight and low material cost, and the light weight and low energy consumption design requirements of the whole floor can be considered.

In some embodiments, referring to fig. 5, the sandwich steel sheet 200 comprises two face sheets 201 and an array of core tubes; wherein, the two panels 201 are arranged at intervals; the core tube array comprises a plurality of core tube units 202 distributed between two panels 201 in an array mode, both ends of each core tube unit 202 are respectively provided with a wrenching structure 2020, and the two wrenching structures 2020 are respectively brazed with the plate surfaces of the two panels 201 through hot air copper.

It should be understood that the thickness of the two panels 201, the distance between each adjacent core tube units 202, the wall thickness of the core tube units 202, and the length can be adjusted according to the requirements of different vehicle models for the strength of the vehicle body, wherein the greater the thickness of the panels 201 and the wall thickness of the core tube units 202, the higher the strength, the smaller the distance between the adjacent core tube units 202, the higher the strength, and the length of the core tube units 202 is determined according to the installation space and the size of the vehicle body, meanwhile, the length of the core tube units 202 also directly relates to the energy absorption effect during collision, and the greater the length, the greater the collapse and bending dimension of the core tube units 202 along the axial direction thereof, the better the energy absorption effect.

Particularly, panel 201 and core tube unit 202 are all preferred to adopt stainless steel material, and not only the corrosion resistance is strong, can guarantee welding strength through hot-blast brazing technique moreover, especially when being provided with at core tube unit 202's both ends and pulling limit structure 2020, can improve the area of contact between core tube unit 202 tip and the panel 201, thereby can further promote welding strength, in addition, adopt hot-blast brazing can weld simultaneously each core tube unit 202 between two panels 201, thereby reduce the welding process degree of difficulty and cost.

Specifically, referring to fig. 3, each core tube unit 202 inside the rear floor 21 in the present embodiment extends in the normal direction of the rear floor 21 where it is located. Because the energy tank body is usually a cylinder, the rear section floor 21 arranged along the shape based on the shape of the energy tank body is of an arc-shaped structure, the core tube units 202 are arranged on each position inside the rear section floor 21 in a normal direction, so that when any position of the rear section floor 21 is pressed, the core tube units 202 corresponding to the position are axially stressed, the core tube units 202 can exert the optimal supporting effect, and when the stress exceeds the supporting strength limit, the axial collapse or bending deformation can be carried out to absorb energy, so that the protection effect on the energy tank body is improved.

In order to improve the connection strength and facilitate connection and fixation, in this embodiment, the two sides of the rear floor 21 in the X direction of the vehicle body are both provided with the hem structures 211, the two hem structures 211 are respectively attached and fixed to the rear cross beam 23 and the middle cross beam 24, and at least one row of core tube units 202 distributed along the Y direction of the vehicle body are arranged inside the hem structures 211. Specifically, utilize two hem structures 211 can laminate and support on the roof of back crossbeam 23 and middle cross beam 24, then adopt two to protect to weld, bolted connection or riveting fixed mode and connect, utilize the inside at least one row of core tube unit 202 of laying of hem structure 211 simultaneously, can improve rear segment floor 21's vertical joint strength, promote its ascending support nature.

In this embodiment, referring to fig. 3 and 4, first blocking plates 212 are fixedly connected to two sides of the rear floor 21, respectively, and the first blocking plates 212 are used for blocking a gap between the two panels 201 and further are used for enclosing a dome cavity adapted to accommodate an upper half portion of the energy tank body together with the rear floor; the outer sides of the two first blocking plates 212 are fixedly attached with second blocking plates 213, and the two second blocking plates 213 are fixedly connected with the two rear section longitudinal beams 22 respectively. The energy tank body is used as a cylinder for explanation, the rear-section floor 21 is understood as an arc-shaped groove extending along the Y direction of the vehicle body, the two first blocking plates 212 are used for blocking notches at two ends of the arc-shaped groove, so that two ends of the energy tank body positioned in the arc-shaped groove are prevented from being exposed, and a side impact protection effect on the energy tank body is ensured, meanwhile, the second blocking plate 213 outside the first blocking plates 212 is fixedly connected with the two rear-section longitudinal beams 22, the second blocking plate 213 can preferably adopt an L-shaped bent plate structure, one bent side of the second blocking plate is attached to the side wall of the rear-section longitudinal beam 22, and the other bent side of the second blocking plate is attached to the top wall of the rear-section longitudinal beam 22, so that the connection strength is improved, wherein the connection mode of the first blocking plate 212 and the end part of the rear-section floor 21, and the connection mode of the second blocking plate 213 and the first blocking plate 212 can be any one of two-protection welding, laser welding, bolt connection or riveting fixation.

As shown in fig. 3 and 4, each core tube unit 202 inside the rear side member 22 in the present embodiment extends in the Y direction of the vehicle body, and each core tube unit 202 inside the rear cross member 23 extends in the X direction of the vehicle body. By utilizing the axial force collapse and bending deformation performance of the core tube unit 202, the core tube unit 202 inside the rear longitudinal beam 22 extends along the vehicle body Y direction to improve the side impact protection effect on the energy tank body, and the core tube unit 202 inside the rear cross beam 23 extends along the vehicle body X direction to improve the rear impact protection effect on the energy tank body.

Specifically, referring to fig. 1 and 4, in the present embodiment, the enclosing plates 221 are disposed at the front end, the rear end, the upper side and the lower side of the rear longitudinal beam 22, and each enclosing plate 221 and the two panels 201 together form a cavity for accommodating the core tube array. Two weld or laser beam weld can be adopted to be connected fixedly between this bounding wall 221 and two panels 201, can avoid the core pipe array to expose on the one hand through setting up bounding wall 221, and on the other hand can utilize the support of bounding wall 221 to further improve the structural strength of back end longeron 22 to promote the side impact protective effect to the energy jar body.

Optionally, in this embodiment, referring to fig. 2 and 3, two ends of the rear cross beam 23 are respectively abutted and fixed to rear end side walls of the two rear end side beams 22, and closing plates 231 are fixedly connected to both upper and lower sides of the rear cross beam 23. That is to say, the rear cross beam 23 supports between two back end longitudinal beams 22, its both ends can carry out two guarantor welding with the lateral wall of two back end longitudinal beams 22 respectively, or riveting fixed, or bolted connection is fixed, thereby utilize the lateral wall of two back end longitudinal beams 22 to carry out the shutoff to its tip, and its upper and lower both sides are through two guarantor welding or laser welding's mode fixed connection shrouding 231 respectively, when with the core tube array closure, utilize shrouding 231 to further promote the X of rear cross beam 23 to the supporting effect of two panels 201 to the intensity, thereby improve and bump the guard effect to the back of the energy jar body.

It should be noted that, in some possible implementations, referring to fig. 5, the sandwich steel plate 200 is filled with the sound-insulating and flame-retardant layer 203. Specifically, the fire-retardant layer 203 that gives sound insulation can be fire-retardant foamer, after two panels 201 and core pipe array welding shaping, directly adopt fire-retardant foamer to be full of the clearance between two panels 201 to form reliable fire-retardant layer, have the effect that gives sound insulation simultaneously concurrently, can effectively prevent external noise and the transmission of energy jar body heat to the car in, improve riding comfort and security.

Based on the same inventive concept, as understood by referring to fig. 1 to 5, the embodiment of the present application further provides an automobile including the rear floor structure described above.

Compared with the prior art, the automobile provided by the embodiment can utilize the rear floor rear section 20 to carry out all-around collision protection on the energy tank body due to the adoption of the rear floor structure, has higher strength compared with a conventional steel plate metal plate structure or an extruded aluminum profile structure, and has small self weight and low material cost due to the sandwich structure, and can meet the design requirements of light weight and low energy consumption of the whole automobile.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Rear floor structure, middle section (10) and rear floor back end (20) that are located energy jar body directly over before the rear floor that is located back row seat below region, its characterized in that, rear floor back end (20) include:

the rear-section floor (21) is arranged right above the energy tank body at intervals and is arranged along the shape of the energy tank body based on the shape of the energy tank body;

the two rear section longitudinal beams (22) are respectively and fixedly connected to two sides of the rear floor and extend along the X direction of the vehicle body, and the front ends of the two rear section longitudinal beams (22) are respectively and fixedly connected with the rear ends of the longitudinal beams (11) on two sides of the front middle section (10) of the rear floor;

the rear cross beam (23) is fixedly connected to the rear side of the rear floor along the X direction of the vehicle body, and two ends of the rear cross beam are fixedly connected with the rear ends of the two rear longitudinal beams (22) respectively;

the middle cross beam (24) is fixedly connected to the front side of the rear floor along the X direction of the vehicle body and is fixedly connected with the rear end of the front middle section (10) of the rear floor;

the rear floor (21), the rear longitudinal beams (22) and the rear cross beams (23) are all sandwich steel plates (200).

2. The rear floor structure of claim 1, wherein the sandwich steel sheet (200) comprises:

two panels (201) arranged at intervals;

the core tube array comprises a plurality of core tube units (202) distributed between two panels (201) in an array mode, wherein both ends of each core tube unit (202) are respectively provided with a pulling edge structure (2020), and the two pulling edge structures (2020) are respectively brazed with the plate surfaces of the two panels (201) through hot air copper.

3. The rear floor structure according to claim 2, characterized in that each core tube unit (202) inside the rear floor panel (21) extends in the normal direction of the rear floor panel (21) where it is located.

4. A rear floor structure according to claim 3, wherein the rear floor (21) is provided with flanged structures (211) at both sides in the X direction of the vehicle body, the flanged structures (211) are respectively attached to the rear cross member (23) and the middle cross member (24), and the flanged structures (211) have at least one row of the core tube units (202) distributed along the Y direction of the vehicle body.

5. The rear floor structure according to claim 4, characterized in that a first blocking plate (212) is fixedly connected to each side of the rear floor (21), the first blocking plate (212) is used for blocking the gap between the two panels (201) and enclosing a dome cavity adapted to accommodate the upper half of the energy tank together with the rear floor (21); two the outside of first closure plate (212) is all laminated and is fixed with second closure plate (213), two second closure plate (213) respectively with two back end longeron (22) fixed connection.

6. The rear floor structure according to claim 2, wherein each of the core tube units (202) inside the rear side member (22) extends in a vehicle body Y direction, and each of the core tube units (202) inside the rear cross member (23) extends in a vehicle body X direction.

7. The rear floor structure according to claim 6, wherein the rear longitudinal beams (22) are provided with enclosing plates (221) at the front end, the rear end, the upper side and the lower side, and each enclosing plate (221) and the two panels (201) together enclose a cavity for accommodating the core tube array.

8. The rear floor structure according to claim 6, wherein both ends of the rear cross member (23) are respectively fixed in abutment with rear end side walls of the two rear side members (22), and closing plates (231) are fixedly connected to both upper and lower sides of the rear cross member (23).

9. The rear floor structure according to any one of claims 1 to 8, wherein the sandwich steel sheet (200) is internally filled with a sound-insulating flame-retardant layer (203).

10. Automotive vehicle, characterized in that it comprises a rear floor structure according to any one of claims 1-9.

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